Watching The Simpsons is not simple. If you watch movies and shows, you are pretty far along. Podcasts and radio are even further, they are super far. You get no subtitles with these, you get no context clues from visuals. Just the sheer size of vocabulary you need and ability to parse spoken sentence. I was able to converse with Americans (have actual discussion) long before I was able to understand English in shows.

I am not native English speaker. I did learned 2 foreign languages. One of them was through very intensive program, the other one without that. It consistently seem to be that these advices are skipping the beginning and also do not conform to either my personal experience or what I observed in others.

Like, obviously you learn faster if you go in super intensive. No question about that. And your interest will fluctuate.